Have you found?
1871 RG10 2996 7 8 Bloomfield Rd, Tipton
1881 RG11 2863 7 9 2 Bloomfield Rd, Tipton
1891 RG12 2284 131 31 Gate St, Tipton
1901 RG13 2736 10 12 Beddow Buildings, New Road, Tipton
Census 1891 - 1911 doesn't include a Mary/Mary Ann . b1885 but all above are Godfreys with a "canal/canal boat" + Tipton association.
Do you have any other info re your Grandmother Mary Ann? What year was she born - was it 1885?
regards